package jdbc;
/**
 * UpDade语句
 */

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class JdbcDemo3 {
    public static void main(String[] args) throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection(
                //数据库地址格式:jdbc:mysql://数据库IP:端口/数据库名?一堆参数
                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",//数据库用户名
                "root"//数据库密码
        );
        Statement statement = connection.createStatement();
        /*
         UPDATE userinfo
         SET username='强强'
         WHERE username='付宗强'
         */
        String sql = "UPDATE userinfo\n" +
                "         SET username='强强'\n" +
                "         WHERE username='小付'";
        int a=statement.executeUpdate(sql);
        if (a>0){
            System.out.println("修改成功");
        }else {
            System.out.println("修改失败");
        }
    }
}
